/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtLocation module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
** This file is part of the HERE geoservices plugin for the Maps and
** Navigation API.  The use of these services, whether by use of the
** plugin or by other means, is governed by the terms and conditions
** described by the file HERE_TERMS_AND_CONDITIONS.txt in
** this package, located in the directory containing the HERE services
** plugin source code.
**
****************************************************************************/

#include "maptiles/qgeotiledmapdata_here.h"
#include "maptiles/qgeotiledmappingmanagerengine_here.h"

#include <QtLocation/private/qgeomapcontroller_p.h>

#include <QDebug>
#include <QObject>
#include <QColor>
#include <QFont>
#include <QPainter>
#include <QImage>
#include <QRect>

#include <QStaticText>

QT_BEGIN_NAMESPACE

/*!
 Constructs a new tiled map data object, which stores the map data required by
 \a geoMap and makes use of the functionality provided by \a engine.
 */
QGeoTiledMapDataHere::QGeoTiledMapDataHere(QGeoTiledMappingManagerEngineHere *engine, QObject *parent /*= 0*/) :
    QGeoTiledMapData(engine, parent),
    logo(":/images/logo.png") // HERE logo image
{}

QGeoTiledMapDataHere::~QGeoTiledMapDataHere() {}

void QGeoTiledMapDataHere::evaluateCopyrights(const QSet<QGeoTileSpec> &visibleTiles)
{
    const int copyrightsMargin = 10;
    const int spaceToLogo = 4;
    const int blurRate = 1;
    const int fontSize = 10;

    QGeoTiledMappingManagerEngineHere *engineHere = static_cast<QGeoTiledMappingManagerEngineHere *>(engine());
    const QString copyrightsString = engineHere->evaluateCopyrightsText(activeMapType(), mapController()->zoom(), visibleTiles);

    if (width() > 0 && height() > 0 && ((copyrightsString.isNull() && copyrightsSlab.isNull()) || copyrightsString != lastCopyrightsString)) {
        QFont font("Sans Serif");
        font.setPixelSize(fontSize);
        font.setStyleHint(QFont::SansSerif);
        font.setWeight(QFont::Bold);

        QRect textBounds = QFontMetrics(font).boundingRect(0, 0, width(), height(), Qt::AlignBottom | Qt::AlignLeft | Qt::TextWordWrap, copyrightsString);

        copyrightsSlab = QImage(logo.width() + textBounds.width() + spaceToLogo + blurRate * 2,
                                qMax(logo.height(), textBounds.height() + blurRate * 2),
                                QImage::Format_ARGB32_Premultiplied);
        copyrightsSlab.fill(Qt::transparent);

        QPainter painter(&copyrightsSlab);
        painter.drawImage(QPoint(0, copyrightsSlab.height() - logo.height()), logo);
        painter.setFont(font);
        painter.setPen(QColor(0, 0, 0, 64));
        painter.translate(spaceToLogo + logo.width(), -blurRate);
        for (int x=-blurRate; x<=blurRate; ++x) {
            for (int y=-blurRate; y<=blurRate; ++y) {
                painter.drawText(x, y, textBounds.width(), copyrightsSlab.height(),
                                 Qt::AlignBottom | Qt::AlignLeft | Qt::TextWordWrap,
                                 copyrightsString);
            }
        }
        painter.setPen(Qt::white);
        painter.drawText(0, 0, textBounds.width(), copyrightsSlab.height(),
                         Qt::AlignBottom | Qt::AlignLeft | Qt::TextWordWrap,
                         copyrightsString);
        painter.end();

        QPoint copyrightsPos(copyrightsMargin, height() - (copyrightsSlab.height() + copyrightsMargin));
        lastCopyrightsPos = copyrightsPos;
        emit copyrightsChanged(copyrightsSlab, copyrightsPos);

        lastCopyrightsString = copyrightsString;
    }

    QPoint copyrightsPos(copyrightsMargin, height() - (copyrightsSlab.height() + copyrightsMargin));
    if (copyrightsPos != lastCopyrightsPos) {
        lastCopyrightsPos = copyrightsPos;
        emit copyrightsChanged(copyrightsSlab, copyrightsPos);
    }
}

int QGeoTiledMapDataHere::mapVersion()
{
    QGeoTiledMappingManagerEngineHere *engineHere = static_cast<QGeoTiledMappingManagerEngineHere *>(engine());
    return engineHere->mapVersion();
}

QT_END_NAMESPACE
